In recent days, the number of cases of new coronavirus pneumonia has increased sharply. Today, the number of confirmed patients in the country has reached 28,065. People have gradually paid more attention to this, and the number of pedestrians wearing masks on the street has also increased significantly. Buses, subways and some public places are strictly required to wear masks to prevent the spread of coronavirus. Masks have clearly become the hottest topic of the moment. How much do you know about wearing masks?
FACELED is here to share your knowledge about masks!
After a closer look, there are all kinds of masks worn around us, some of which are obviously not professional protective masks. During the epidemic, wearing a mask is a key protective measure. We must clearly understand and properly wear a mask.
I. Purchasing standards for masks at home and abroad
When we buy masks, we must identify the standard number in order to ensure that we can buy genuine anti-epidemic masks. Each country or region has its own mask standards, and the different standards are different filtration rates and raw materials, such as China ’s KN95, US N95, European EN149 or FFP2 (3), and Japanese DS2.
1.Chinese mask standards
China's mask standards have three levels of protection: 90/95/100; there are two types, KN and KP.
● KN means that the mask is suitable for filtering non-oily particles;
● KP means that the mask is suitable for filtering oily and non-oily particles.
* National standard GB2626-2006 classification of particulate protective masks
National standard GB2626-2006 masks can isolate particles such as dust, smoke, mist and microorganisms. People who work in hospitals or need to enter infected areas must wear masks with a filtration rate of 95% or more in strict accordance with standards.
2.Overseas mask standards
Demand for masks in China has increased, and many have begun buying foreign brands. The same standards as Chinese KN95 include the American standard "N95" masks; the European standard EN149 or FFP2 (3); the Japanese "DS2" standard and so on.
American protective mask standard classification
Common "N95" masks are based on American standards, which divide medical protective masks into three categories and nine models.
● N stands for non-oily particles, such as coal dust, cement dust, etc.
● R and P represent oily particles, such as oil salt, coke oven smoke, etc.
* Classification of Particulate Matte Protective Masks by US NIOSH Standard
European protective mask standard classification
Compared with the American standard and the national standard, the European standard is quite different. The European mask standard is EN149: 2001 + A1, which has three levels: FFP1, FFP2, and FFP3, and the corresponding filtration efficiency is 80%, 94%, and 99%.
* European EN149 standard classification
* FFP is the Filtering Face Piece, which meets the European standard EN149 but does not reach the FFP2 level.
European standards do not distinguish between oily and non-oily, European standards can filter both oily and non-oily particles at the same time, but the same protection level will also have different product models. The filtration rate of FFP2 is similar to that of the US N95 and China KN95. When purchasing European masks, the masks above FFP2 level shall prevail.
Japanese protective mask standard classification
The Japanese mask standard "DS2" is the national standard of the Japanese Ministry of Health, Labour and Welfare, which is equivalent to the national standard "KN95" and the American standard "N95". The package is printed with: ウ ィ ル ス カ ッ ト 99% (poison interception 99%), which refers to medical masks that exceed the 95% domestic filtration efficiency standard (same as N95 masks).
* Japanese masks are marked with the PFE logo
Masks in Japan are different from masks in other regions. There is no clear identification, but most of the masks that meet the 99% droplet interception standard are sold in drug stores. When you buy, you can clearly see the filtering efficiency of "PFE".
Taiwan protective mask standard classification
According to the performance of masks, the Taiwan Health Bureau distinguishes three types: "medical grade CNS14774" and "haze and dustproof CNS15980 and CNS14755". Medical grade masks are subdivided into "general medical masks". , "Surgical masks", "surgical D2 dust masks" three. Similar to European and American standards.
Korean protective mask standard classification
Most mask types in South Korea start with (KF), that is (Korean Filter), and the subsequent numbers represent the filter density and the ability to block particles of this mask.
For example, (KF80) represents that it can block 80%, 0.6 micron particles, and can only be used to prevent pollen, sand, and air. It does not have enough ability to block infectious bacteria. (KF94) masks above the level can effectively block 94% or more of about 0.4 microns of fine particles, and can prevent the spread of germs.